CN108661803A - A kind of waste heat recycle method improving generating efficiency - Google Patents
A kind of waste heat recycle method improving generating efficiency Download PDFInfo
- Publication number
- CN108661803A CN108661803A CN201810270656.3A CN201810270656A CN108661803A CN 108661803 A CN108661803 A CN 108661803A CN 201810270656 A CN201810270656 A CN 201810270656A CN 108661803 A CN108661803 A CN 108661803A
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- Prior art keywords
- steam
- water
- gas
- waste heat
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02C—GAS-TURBINE PLANTS; AIR INTAKES FOR JET-PROPULSION PLANTS; CONTROLLING FUEL SUPPLY IN AIR-BREATHING JET-PROPULSION PLANTS
- F02C6/00—Plural gas-turbine plants; Combinations of gas-turbine plants with other apparatus; Adaptations of gas- turbine plants for special use
- F02C6/18—Plural gas-turbine plants; Combinations of gas-turbine plants with other apparatus; Adaptations of gas- turbine plants for special use using the waste heat of gas-turbine plants outside the plants themselves, e.g. gas-turbine power heat plants
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
- F01D15/00—Adaptations of machines or engines for special use; Combinations of engines with devices driven thereby
- F01D15/10—Adaptations for driving, or combinations with, electric generators
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01K—STEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES
- F01K11/00—Plants characterised by the engines being structurally combined with boilers or condensers
- F01K11/02—Plants characterised by the engines being structurally combined with boilers or condensers the engines being turbines
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01K—STEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES
- F01K13/00—General layout or general methods of operation of complete plants
Abstract
The invention belongs to fuel gas generation technical fields, it is related to a kind of waste heat recycle method improving generating efficiency, gas turbine, waste heat boiler, steam turbine are combined by this method, gas enters gas turbine acting and drives combustion vapour electrical power generators, the tail cigarette of generation is entered into waste heat boiler from gas inlet, becomes steam and is conveyed to steam turbine acting drive steam-driven generator power generation；The tail cigarette of steam turbine discharge enters condenser and becomes condensed water, it is conveyed to regenerative apparatus through condensate pump, economizer is entered by feed pump again, water heat absorption heating enters drum, steam-water separator is entered back into, water enters regenerative apparatus through feed pump again to waste heat boiler moisturizing by spool, and steam comes out to superheater absorption heat from steam-water separator, so that saturated vapor is become superheated steam and resupply steam turbine, to be again introduced into cyclic process.The present invention efficiently uses tail cigarette waste heat, improves gas electricity efficiency, reduces drawing-off gas rate, increases operation rate, economize on resources, environmental protection.
Description
Technical field
The invention belongs to fuel gas generation technical fields, are related to a kind of waste heat recycle method improving generating efficiency.
Background technology
China's coal bed gas resource very abundant is the third-largest reserves state in the world after Russia, Canada, accounts for generation
The 13% of 12 national resources total amounts before boundary's ranking.Coal bed gas, i.e. gas, main component methane are that one kind will produce strongly
The greenhouse gases of greenhouse effects, greenhouse effects are about 21 times of carbon dioxide, and atmospheric environment can be caused by being directly discharged into air
One of the main reason for serious to pollute, and gas explosion is coal mining accident.Therefore gas electricity station is built, to coal bed gas resource
It fully develops and uses, can not only turn waste into wealth, turn bane into boon, can further increase coal with " to be taken out with rush, to take out warranty "
Layer gas methane drainage and utilization project dynamics, strengthens control of coalmine gas, mitigates coal mine gas disaster；Gas electricity station is established in coal mine, it will be former
It generates electricity come the gas utilization exhausted, can turn waste into wealth, economize on resources, also implemented the state basic policy of national development circular economy, promote
Recycling Economy System is established into enterprise, has ensured the sustainable development of enterprise.
Currently, in high methane and coal and gas outburst mine, coal bed gas extraction and multiplex utilization facilities are established.
Gas electricity is the comprehensive utilization project of current most mainstream.But the effective thermal efficiency of the used gas engine of gas electricity unit
Only 30-40%, and cooling water is up to 45-65% with exhaust heat, reduces generating efficiency, and fail to efficiently use
This part of waste heat causes the certain wasting of resources and environmental pollution.
Invention content
The purpose of the invention is to overcome the shortcomings of above-mentioned technology, a kind of waste heat recovery profit improving generating efficiency is provided
With method, which is characterized in that gas turbine 1, waste heat boiler 2, steam turbine 3 are combined by this method, and gas enters combustion steamer
The acting of machine 1 drives combustion vapour generator 13 to generate electricity, and the tail cigarette of generation is entered waste heat boiler 2 from gas inlet, flue gas bottom horizontal flow sheet,
Flow through superheater 4, evaporator 5 and economizer 6, finally from exhanst gas outlet be discharged, exhaust gas temperature is about 170 DEG C, flue-gas temperature from
550 DEG C drop to exhaust gas temperature, and the heat released is conveyed to the acting drive steam-electric power of steam turbine 3 for making water become steam
Machine 14 generates electricity；The tail cigarette that steam turbine 3 discharges enters condenser 7 and becomes condensed water, and regenerative apparatus 9 is conveyed to through condensate pump 8, then
Enter economizer 6 by feed pump 10, water, which absorbs heat, makes water temperature rise, and water temperature is raised to the saturation under slightly below 11 pressure of drum
Temperature just leaves economizer 6 and enters drum 11, after mixing with saturated water, starts to steam into the heat absorption of evaporator 5, but usually only
Some water becomes vapour, so in 5 Bottomhole pressure of evaporator being steam water interface, steam water interface must enter steam-water separation
Device 12, separates vapour and water；Water by spool enter regenerative apparatus 9 through feed pump 10 again give 2 moisturizing of waste heat boiler, and steam from
Steam-water separator 12 comes out to superheater 4 and absorbs heat, so that saturated vapor is become superheated steam and resupplies steam turbine 3, to
It is again introduced into cyclic process.
The beneficial effects of the invention are as follows：
1. the exhaust gas temperature of about 550 DEG C of the tail cigarette waste heat of steam turbine discharge, waste heat boiler is 170 DEG C, efficiently use about
380 DEG C of waste heat.
2. the effective thermal efficiency of gas is increased to 70% or more from 30-40%, generating efficiency is effectively increased.
3. reducing emission index of the gas to air, improve the utilization rate of gas, play economize on resources, environmental protection
Effect.
The present invention will be further described with reference to the accompanying drawings and examples.
Description of the drawings
Fig. 1 is the process schematic of the method for the present invention.
In figure：
1. gas turbine, 2. waste heat boilers, 3. steam turbines, 4. superheaters, 5. evaporators, 6. economizers, 7. condensers,
8. condensate pump, 9. regenerative apparatus, 10. feed pumps, 11. drums, 12. steam-water separators, 13. gas electricity generators, 14. steam-electric powers
Machine.
Specific implementation mode
Referring to attached drawing 1, a kind of waste heat recycle method improving generating efficiency proposed by the present invention, which is characterized in that
Gas turbine 1, waste heat boiler 2, steam turbine 3 are combined by this method, and gas enters the acting of gas turbine 1 and drives combustion vapour power generation
Machine 13 generates electricity, and the tail cigarette of generation is entered waste heat boiler 2 from gas inlet, flue gas bottom horizontal flow sheet flows through superheater 4, evaporator 5
With economizer 6, finally it is discharged from exhanst gas outlet, exhaust gas temperature is about 170 DEG C, and flue-gas temperature drops to exhaust gas temperature from 550 DEG C, institute
The heat of releasing is conveyed to the acting drive power generation of steam-driven generator 14 of steam turbine 3 for making water become steam；3 row of steam turbine
The tail cigarette put enters condenser 7 and becomes condensed water, is conveyed to regenerative apparatus 9 through condensate pump 8, then enter by feed pump 10 and save coal
Device 6, water absorb heat so that water temperature is increased, water temperature is raised to the saturation temperature under slightly below 11 pressure of drum, just leave economizer 6 into
Enter drum 11, after mixing with saturated water, start to steam into the heat absorption of evaporator 5, but usually only a part of water becomes vapour, so
What it is in 5 Bottomhole pressure of evaporator is steam water interface, and steam water interface must enter steam-water separator 12, vapour and water are separated；Water
Enter regenerative apparatus 9 through feed pump 10 again to 2 moisturizing of waste heat boiler by spool, and steam came out to from steam-water separator 12
Hot device 4 absorbs heat, so that saturated vapor is become superheated steam and resupplies steam turbine 3, to be again introduced into cyclic process.
Claims (1)
1. a kind of waste heat recycle method improving generating efficiency, which is characterized in that this method is by gas turbine (1), waste heat
Boiler (2), steam turbine (3) are combined, and gas enters gas turbine (1) acting and combustion vapour generator (13) is driven to generate electricity, and will produce
Raw tail cigarette enters waste heat boiler (2) from gas inlet, and flue gas bottom horizontal flow sheet flows through superheater (4), evaporator (5) and saves coal
Device (6) is finally discharged from exhanst gas outlet, and exhaust gas temperature is about 170 DEG C, and flue-gas temperature drops to exhaust gas temperature from 550 DEG C, is released
Heat be used for make water become steam be conveyed to steam turbine (3) acting drive steam-driven generator (14) generate electricity；Steam turbine (3)
The tail cigarette of discharge enters condenser (7) and becomes condensed water, is conveyed to regenerative apparatus (9) through condensate pump (8), then pass through feed pump
(10) enter economizer (6), water, which absorbs heat, makes water temperature rise, and water temperature is raised to the saturation temperature under slightly below drum (11) pressure
Degree just leaves economizer (6) and enters drum (11), after mixing with saturated water, starts to steam into evaporator (5) heat absorption, but logical
Often only some water becomes vapour, so in evaporator (5) Bottomhole pressure being steam water interface, steam water interface must enter vapour
Separator (12), separates vapour and water；Water enters regenerative apparatus (9) through feed pump (10) again to waste heat boiler by spool
(2) moisturizing, and steam comes out to superheater (4) from steam-water separator (12) and absorbs heat, and saturated vapor is made to become superheated steam
Steam turbine (3) is resupplied, to be again introduced into cyclic process.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810270656.3A CN108661803A (en) | 2018-03-29 | 2018-03-29 | A kind of waste heat recycle method improving generating efficiency |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810270656.3A CN108661803A (en) | 2018-03-29 | 2018-03-29 | A kind of waste heat recycle method improving generating efficiency |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108661803A true CN108661803A (en) | 2018-10-16 |
Family
ID=63782901
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810270656.3A Pending CN108661803A (en) | 2018-03-29 | 2018-03-29 | A kind of waste heat recycle method improving generating efficiency |
Country Status (1)
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| CN (1) | CN108661803A (en) |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2274691Y (en) * | 1995-01-24 | 1998-02-18 | 哈尔滨普华煤燃烧技术开发中心 | Low and medium temperature extra steam/hot water electric power generator |
| CN101037952A (en) * | 2006-12-12 | 2007-09-19 | 邢一崧 | Integral combined circulating power generation system of coal bed gas and coal mine ventilation gas |
| CN101806230A (en) * | 2010-03-19 | 2010-08-18 | 湖南永清环保股份有限公司 | System and method for using sintering waste heat to generate electricity |
| CN101968317A (en) * | 2010-11-25 | 2011-02-09 | 中冶赛迪工程技术股份有限公司 | Sintering waste heat generating system |
| CN201897203U (en) * | 2011-03-31 | 2011-07-13 | 广州大学城华电新能源有限公司 | Residual heat boiler adopted by power plant/energy resource station |
| CN103291390A (en) * | 2013-06-20 | 2013-09-11 | 华效资源有限公司 | Heating furnace flue gas and steam waste heat recycling and power generating system and power generating method |
| CN104500158A (en) * | 2014-12-02 | 2015-04-08 | 中国矿业大学 | Low-concentration coalbed methane or gas electric generating system |
| US9140184B2 (en) * | 2012-05-31 | 2015-09-22 | General Electric Company | Supercharged combined cycle system with air flow bypass to HRSG and fan |
| CN106122929A (en) * | 2016-08-30 | 2016-11-16 | 华能国际电力股份有限公司 | A kind of dosing for combined cycle generating unit multiple pressure waste heat boiler and sampler |
| CN107489468A (en) * | 2017-09-18 | 2017-12-19 | 贵州盘江煤层气开发利用有限责任公司 | A kind of low-concentration gas power generation system based on intermittent combustion |
-
2018
- 2018-03-29 CN CN201810270656.3A patent/CN108661803A/en active Pending
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2274691Y (en) * | 1995-01-24 | 1998-02-18 | 哈尔滨普华煤燃烧技术开发中心 | Low and medium temperature extra steam/hot water electric power generator |
| CN101037952A (en) * | 2006-12-12 | 2007-09-19 | 邢一崧 | Integral combined circulating power generation system of coal bed gas and coal mine ventilation gas |
| CN101806230A (en) * | 2010-03-19 | 2010-08-18 | 湖南永清环保股份有限公司 | System and method for using sintering waste heat to generate electricity |
| CN101968317A (en) * | 2010-11-25 | 2011-02-09 | 中冶赛迪工程技术股份有限公司 | Sintering waste heat generating system |
| CN201897203U (en) * | 2011-03-31 | 2011-07-13 | 广州大学城华电新能源有限公司 | Residual heat boiler adopted by power plant/energy resource station |
| US9140184B2 (en) * | 2012-05-31 | 2015-09-22 | General Electric Company | Supercharged combined cycle system with air flow bypass to HRSG and fan |
| CN103291390A (en) * | 2013-06-20 | 2013-09-11 | 华效资源有限公司 | Heating furnace flue gas and steam waste heat recycling and power generating system and power generating method |
| CN104500158A (en) * | 2014-12-02 | 2015-04-08 | 中国矿业大学 | Low-concentration coalbed methane or gas electric generating system |
| CN106122929A (en) * | 2016-08-30 | 2016-11-16 | 华能国际电力股份有限公司 | A kind of dosing for combined cycle generating unit multiple pressure waste heat boiler and sampler |
| CN107489468A (en) * | 2017-09-18 | 2017-12-19 | 贵州盘江煤层气开发利用有限责任公司 | A kind of low-concentration gas power generation system based on intermittent combustion |
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Application publication date: 20181016 |
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